<?php

class CommentController extends Controller {

    public $layout = 'column2';

    /**
     * @var CActiveRecord the currently loaded data model instance.
     */
    private $_model;

    /**
     * @return array action filters
     */
    public function filters() {
        return array(
            'accessControl', // perform access control for CRUD operations
        );
    }

    /**
     * Specifies the access control rules.
     * This method is used by the 'accessControl' filter.
     * @return array access control rules
     */
    public function accessRules() {
        return array(
            array('allow', // allow authenticated users to access all actions
                'users' => array('admin'),
            ),
            array('deny', // deny all users
                'users' => array('*'),
            ),
        );
    }

    /**
     * Updates a particular model.
     * If update is successful, the browser will be redirected to the 'view' page.
     */
    public function actionUpdate() {
        $model = $this->loadModel();
        if (isset($_POST['ajax']) && $_POST['ajax'] === 'comment-form') {
            echo CActiveForm::validate($model);
            Yii::app()->end();
        }
        if (isset($_POST['Comment'])) {
            $model->attributes = $_POST['Comment'];
            if ($model->save())
                $this->redirect(array('index'));
        }

        $this->render('update', array(
            'model' => $model,
        ));
    }

    /**
     * Deletes a particular model.
     * If deletion is successful, the browser will be redirected to the 'index' page.
     */
    public function actionDelete() {
        if (Yii::app()->request->isPostRequest) {
            // we only allow deletion via POST request
            $this->loadModel()->delete();

            // if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
            if (!isset($_POST['ajax']))
                $this->redirect(array('index'));
        }
        else
            throw new CHttpException(400, 'Invalid request. Please do not repeat this request again.');
    }

    /**
     * Lists all models.
     */
    public function actionIndex() {
        $dataProvider = new CActiveDataProvider('Comment', array(
                    'criteria' => array(
                        'with' => 'post',
                        'order' => 't.status, t.create_time DESC',
                    ),
                ));

        $this->render('index', array(
            'dataProvider' => $dataProvider,
        ));
    }

    /**
     * Approves a particular comment.
     * If approval is successful, the browser will be redirected to the comment index page.
     */
    public function actionApprove() {
        if (Yii::app()->request->isPostRequest) {
            $comment = $this->loadModel();
            $comment->approve();
            $this->redirect(array('index'));
        }
        else
            throw new CHttpException(400, 'Invalid request. Please do not repeat this request again.');
    }

    /**
     * Returns the data model based on the primary key given in the GET variable.
     * If the data model is not found, an HTTP exception will be raised.
     */
    public function loadModel() {
        if ($this->_model === null) {
            if (isset($_GET['id']))
                $this->_model = Comment::model()->findbyPk($_GET['id']);
            if ($this->_model === null)
                throw new CHttpException(404, 'The requested page does not exist.');
        }
        return $this->_model;
    }

}
